Remove XValidation rule in DPA as requires K8S >= 1.25

[vboulineau]

What does this PR do?

Remove XValidation rule in DPA as requires K8S >= 1.25

Motivation

Bugfix.

Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

Describe your test plan

Write there any instructions and details you may have to test your PR.

Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.51%. Comparing base (ca6ce6c) to head (9c7d5ad).
Report is 23 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1339   +/-   ##
=======================================
  Coverage   47.51%   47.51%           
=======================================
  Files         230      230           
  Lines       22040    22040           
=======================================
  Hits        10472    10472           
  Misses      10976    10976           
  Partials      592      592           

Flag	Coverage Δ
unittests	47.51% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...s/datadoghq/v1alpha1/datadogpodautoscaler_types.go	100.00% <ø> (ø)

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